300mm focal length
full frame
f/4.5 aperture
6 elements in 4 groups
later versions were multicoated
older versions nominated as F-Zuiko not Zuiko
close focus 3.5m giving area of 21cm x 32cm (8.3“ x 12.6”)
built in retractable hood
72mm filter
tripod mount
181mm long with hood extended
1000g